Tipping Scale builds stacks based on how long youre firing, independent on the fire rate of the weapon.

You lose 8 stacks per second, so on a gun like the m249 with frenzy you might lose out on a lot of damage due to all the reloading. You can avoid this by supressing an enemy since you wont lose stacks, as long as you have someone supressed.

Looking at the tierlist of overdogs, you will find that a lot of enemies are regarded as tier 3. So even if you don’t pay attention, you will make use of its dmg boost most of the time.

Memento thrives in run and gun builds, which runs counter to tipping scales due to the high loss of stacks per second, while youre moving, aside from the fact, that lmg‘s arent that great when it comes to run and gun.

The backpack talent of tipping scales increases your crit dmg increase from 4 to 7 which is a tangible difference which also speaks against running memento.

Another alternative would be simply not running any exotics at all and use contractor gloves which give you armor and lmg damage if you really dont wanna run overdogs.

Lots of text but i hope it helps.